The trip from Frederick to Arlington is about 75 kilometers and takes 1 hour by car. You will travel south on I-270 and then take the I-495 Capital Beltway into Virginia. This is a common commute for those working in Northern Virginia. Public transit options are available, but driving is the most common method for this route.
Total Distance: 75 km driving, 65 km air distance.
The Beltway can be very congested; use real-time traffic apps.
Anytime, but avoid rush hour for a smoother trip.